Variable-delay polarization modulators for cryogenic millimeter-wave applications

被引:9
|
作者
Chuss, D. T. [1 ]
Eimer, J. R. [2 ]
Fixsen, D. J. [1 ]
Hinderks, J. [1 ]
Kogut, A. J. [1 ]
Lazear, J. [2 ]
Mirel, P. [1 ]
Switzer, E. [1 ]
Voellmer, G. M. [1 ]
Wollack, E. J. [1 ]
机构
[1] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[2] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA
来源
REVIEW OF SCIENTIFIC INSTRUMENTS | 2014年 / 85卷 / 06期
关键词
GRIDS;
D O I
10.1063/1.4879499
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
We describe the design, construction, and initial validation of the variable-delay polarization modulator (VPM) designed for the PIPER cosmic microwave background polarimeter. The VPM modulates between linear and circular polarization by introducing a variable phase delay between orthogonal linear polarizations. Each VPM has a diameter of 39 cm and is engineered to operate in a cryogenic environment (1.5 K). We describe the mechanical design and performance of the kinematic double-blade flexure and drive mechanism along with the construction of the high precision wire grid polarizers. (C) 2014 AIP Publishing LLC.
引用
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页数:6
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